Effect of temperature on inter-metallic associations in Sb-Zn liquid alloys

被引：34

作者：

Prasad, LC ^{[1
]}

Mikula, A ^{[1
]}

机构：

[1] Univ Vienna, Inst Anorgan Chem, A-1090 Vienna, Austria

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2000年 / 299卷 / 1-2期

基金：

奥地利科学基金会;

关键词：

Sb-Zn liquid alloys; Zn4Sb3; inter-metallic associations; concentration fluctuations; chemical short range order; diffusion;

D O I：

10.1016/S0925-8388(99)00678-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A statistical mechanical theory, in conjunction with a compound formation model has been used to develop expressions for various thermodynamic and microscopic structural functions for 4:3 inter-metallic compounds. These expressions, in turn, have been used to investigate the alloying behaviour and its temperature dependence in Sb-Zn liquid alloys. Our expressions for 4:3 compounds not only reproduce the asymmetric nature of thermodynamic functions such as the excess free energy of mixing and the activity coefficient but also provide structural information about Sb-Zn liquid alloys. The study of concentration fluctuations in the long wavelength limit [Scc(0)], chemical short range order parameter (alpha(1)) and diffusion coefficient clearly demonstrate the presence of Zn4Sb3 compounds in the melt. It is also observed that the tendency for inter-metallic associations, which leads to the formation of Zn4Sb3 compounds, decreases with the increase of temperature. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：175 / 182

页数：8

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